Spa shell



FIG. 1 is a top plan view of a spa shell showing my new design;

FIG. 2 is a first perspective view of a spa shell showing my new design;

FIG. 3 is a second perspective view of a spa shell showing my new design;

FIG. 4 is a third perspective view of a spa shell showing my new design;

FIG. 5 is a fourth perspective view of a spa shell showing my new design;

FIG. 6 is a cross-sectional view taken along line 6—6 of FIG. 1;

FIG. 7 is a cross-sectional view taken along line 7—7 of FIG. 1;

FIG. 8 is a cross-sectional view taken along line 8—8 of FIG. 1; and

FIG. 9 is a cross-sectional view taken along line 9—9 of FIG. 1.

FIG. 10 is an enlarged view of the area labeled “FIG. 10” in FIG. 8; and,

FIG. 11 is an enlarged view of the area labeled “FIG. 11” in FIG. 9.

The broken lines shown in the drawings represent unclaimed structure of the spa shell and form no part thererof. 

The ornamental design for a spa shell, as shown and described. 